$(document).ready(function () { 
    if($('.followDiv').length>0){
        var msie6 = $.browser == 'msie' && $.browser.version < 7;
        if (!msie6) {
            var top = $('.followDiv').find('div').offset().top;
            $(window).scroll(function (event) {
                // what the y position of the scroll is
                var y = $(this).scrollTop();
                // whether that's below the form
                if (y >= top) {
                    // if so, ad the fixed class
                    $('.followDiv').addClass('fixed');
                } else {
                    // otherwise remove it
                    $('.followDiv').removeClass('fixed');
                }
            });
        }
    }
});